#include "stm32f10x.h"                  // Device header

/**
  * 函    数：PWM初始化
  * 参    数：无
  * 返 回 值：无
  */
void PWM_Init_TIM3(void)
{

	RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM3, ENABLE);		
	RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA, ENABLE);			
	
	GPIO_InitTypeDef GPIO_InitStructure;
	GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
	GPIO_InitStructure.GPIO_Pin =GPIO_Pin_7;
	GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
	GPIO_Init(GPIOA, &GPIO_InitStructure);							
															
	TIM_InternalClockConfig(TIM3);		

	TIM_TimeBaseInitTypeDef TIM_TimeBaseInitStructure;			
	TIM_TimeBaseInitStructure.TIM_ClockDivision = TIM_CKD_DIV1;    
	TIM_TimeBaseInitStructure.TIM_CounterMode = TIM_CounterMode_Up; 
	TIM_TimeBaseInitStructure.TIM_Period = 10000 - 1;			
	TIM_TimeBaseInitStructure.TIM_Prescaler = 72 - 1;				
	TIM_TimeBaseInitStructure.TIM_RepetitionCounter = 0;          
	TIM_TimeBaseInit(TIM3, &TIM_TimeBaseInitStructure);            

	TIM_OCInitTypeDef TIM_OCInitStructure;							
	TIM_OCStructInit(&TIM_OCInitStructure);                       
	                                                                                                                           
	TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM1;             
	TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_High;       
	TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;  
	TIM_OCInitStructure.TIM_Pulse = 0;								
	TIM_OC2Init(TIM3, &TIM_OCInitStructure);                     
	
	TIM_Cmd(TIM3, ENABLE);			
}


void PWM_SetCompare2_TIM3(uint16_t Compare)
{
	TIM_SetCompare2(TIM3, Compare);
}
